Dressing-tool for grinding-wheels



E.T.GORHAM.

DRESSING TOOL FOR GRINDING WHEELS.

APPLICATION FILED MAY 11, 1917. I 1,339,452. Pa ented May 11, 1920.

2 SHEETS-SHEET I.

age/1M E. T. GOBHAM.

DRESSING TOOL FOR GRINDING WHEELS. APPLICATION FIILED MAYH. 1.917.

1,339,452. Patented May 11, 1920.

2 SHEETS-SHEET 2L 1/ Ir) uen ib/ Eda/l T Gar/1g) nNrrEn sTATEs PATENT oEEIoE.

EDWIN T. GORHAM, or GRAND RAPIDS, MioriIGA ASSIGNOR 'ro WILMARTH & MORMAN COMPANY, or GRAND RArIDs, MICHIGAN, A CORPORATION or MICHIGAN.

DRESSING-TOOL FOR GRINDING-WHEELS.

Specification of Letters Iatent. Patented lay 11, 1920.

Application filed May 1'7, 1917. Serial No. 169,225.

To all whom it may concern.-

Be it known that I, EDWIN T. GORHAM, a

citizen of the United States of America, re

do hereby declare the following to be a full,

clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a dressing tool for grinding wheels and a means for mounting the same adjacent the grinding wheel whereby the tool may be readily moved over the face of the wheel to dress the same to proper shape if at any time it becomes worn or otherwise roughened or misshapened after service for a considerable length of time. It is the primary object and purpose of my invention to provide a dressing tool of simple construction and to removably mount it in a simple manner adjacent a grinding wheel such that it may be readily operated by hand and moved back and forth across the face of the wheel, whereby when the wheel is rotated, the grinding surface thereof, may be dressed and trued to shape. Various other objects and purposes will appear as understandinglof the invention is had from the disclosure made in the accompanying drawings in which: c

Figure 1 is a plan view, with a part of the hood broken away, of a grinding wheel having my invention applied thereto.

Fig. 2 is a front elevation thereof.

Fig. 3 is an elevation, with parts shown in section, of the tool and Fig. 1 is an under plan view of the construction shown in Fig. 8.

Like reference characters refer to like parts throughout the several views of the drawings.

In the construction I provide a member having a body 1 substantially square in cross section which at one end has a cylindrical extension 2 around which sleeve 3 passes, this sleeve being integralwith a latteral cylindrical extension 4 as shown. The sleeve is adapted to be secured in fixed position on the part 2 by means of a set screw 5 and it is apparent that, by operation of the set screw, the sleeve may be moved to a plurality of positions with respect to the part 2 and may be held in any desired ad usted position thereon. A sleeve 6 is loosely mounted upon the part 4 being held thereon by a plate 7 which is attached, by means of a screw 8, to the end of the part 4 its edges extending so as to cover the ends of sleeve 6.

At the end of the body 1 a bar 9 is pivotally connected substantially midway between its ends, a screw 10 passing loosely through the bar and threading into the body 1. At one end bar 9 is turned back substantially at right angles as indicated at 11 and a lug 12 is fixed thereto extending over the body 1. -A pin 13 passes loosely through the lug 12 having a collar l-itthereon below the lug and an operating head 15 above the lug. That portion of the pin below collar 14 is threaded and passes downwardly into an opening 16 made in the body 1. A rock nut 17 is pivotally mounted on part 1 and extends across opening 16, the threaded end of pin 13 passing therethrough as shown.

At its opposite end bar 9 is turned in a direction opposite to the end 11 and is divided to form two fingers 18 between which a series of star cutters 19 are loosely mounted upon a shaft 20, said shaft being. normally held in place by clips 21 which, how ever, may be moved away from the ends of the shaft so that it may be removed whenever the cutters are worn out and need replacement.

In Figs. 1 and 2, a grinding wheel 22 is partially covered by a protecting hood 23 to which, at any desired point, a projecting member 24 may be fixed, either by any suitable connecting means as shown, or by casting the same integral with the hood. Said member has an opening therein made preferably in a direction parallel to the axis of the grinding wheel adapted to receive sleeve 6. In practice the diameter of the opening is a very little larger than the diameter of the sleeve so that the sleeve may be easily received but is held quite snugly therein.

Vith the tool thus attached to the hood, it will be noted that the star cutters are nearest the face of the wheel and sleeve 6 may be entered a greater or less distance into the opening in the member 24 so as to bring the cutters substantially into contact with the face of the wheel, after which the side of a grinding wheel.

finer adjustment is effected by operating screw 13 whereby the cutters are brought into contact with the face of the wheel. I he wheel is rotated at high speed and the cut ters are moved by hand back and forth across the face thereof, the cylindrical section 4 turning freely within the sleeve 6 and as will be understood. F or different sizes of wheels the adjustment of the sleeve 3 with respect to the cylinder extension 2 may be changed.

This tool is relatively simple in construction and has proved very effective in actual practice. By it grinding wheels may be dressed very quickly and accurately. I have shown the tool as applied to the hood which partially covers the grinding wheel. In the great majority of cases this is the most convenient place to which the tool may be applied; but it is to be understood that my in vention is not limited to the one particular location but that any convenientstationary support for the tool adjacent the grinding wheel may be utilized quite as well. I have also shown the tool in use for dressing the It is, however,

. apparent that the circumference of the wheel may be dressed in the same manner and by the same tool, there being necessitated only a different location of the boss which receives the sleeve 6. Furthermore the particular form of cutter 19 illustrated in the drawing is not in any way an essential feature of the invention as any of the standard and approved forms of dressing cutters may be used in the tool if desired.

I claim 1. In combination with a rotatably mounted grinding wheel, a hood therefor, a projection thereon provided with an open ing therethrough, said opening paralleling the axis of the wheel, a body member, a second member mounted on and adjustable lengthwise of said body member, said last mentioned member having a cylindrical lateral extension, a sleeve loosely mounted on said extension and inserted in the opening in said projection on the hood, a bar pivotally mounted on the body member, a threaded pin loosely mounted at one end of the bar, a rock nut mounted on the body member, said pin threading therethrough, and a dressing cutter carried at the opposite end of the bar and adapted to engage with a face of the grinding wheel to dress the same as the wheel is rotated.

2. In combination with a rotatably mounted grinding wheel, a body member, a second member mounted adjacent one end of and adjustable lengthwise of said body member, said second mentioned member having a cylindrical lateral extension, a sleeve loosely mounted on the extension, a stationary support adjacent the grinding wheel to which said sleeve is detachably with a rotatable mounted grinding Wheel, a hood therefor,

a tool loosely and pivotally mounted on the hood to turn about an axis paralleling the axis of rotation of the wheel, said tool passing across the face of the wheel and including a dressing cutter adaptedto be brought against the face of the wheel and also including means for manually adjusting the cutter toward or away from the face of the wheel, substantially as described.

4. In combination with a rotatably mounted grinding wheel, a stationary sup port adjacent the wheel, a tool pivotally mounted on the support to turn about an axis parallel to the axis of rotation of the wheel, said tool passing across the front of the wheel and including in its structure means for adjusting the tool to vary the length thereof, a dressing cutter located in front of the wheel and means for adjusting the cutter toward or away from the face of the wheel, substantially as described.

A tool of the character described coinprising a body member, a member mounted at one end of the body member and ad ustable lengthwise thereof, said second mentioned member having a lateral cylindrical extension, a sleeve loosely mounted on the extension, a bar pivotally mounted between its ends at one end of the body member and located substantially at right angles to the length of said body member and having right angular branches at its ends extending in opposite directions, a pin rotatably mounted on a branch, a rock nut on the body member through which said p n is threaded, and a dressing cutter carried by the other branch of the bar, substantially as described.

6. In combination with a rotatably mounted grinding wheel, a hood covering the upper portion thereof, a member on the hood provided with a cylindrical opening the axis of which parallels the axis of rotation of the wheel, a tool pivotally mount ed in said member, said tool including a member extending across the face of the wheel, and adapted to be manually moved over the face of the wheel together with a dressing cutter carried by said member adapted to dress the face of the wheel, and means for adjusting the cutter toward or away from the face of the wheel.

In testimony whereof I afiix my signature.

EDWIN T. GORHAM. 

